From: Kees Cook <keescook@chromium.org>
To: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Hante Meuleman <hante.meuleman@broadcom.com>,
Franky Lin <franky.lin@broadcom.com>,
Arend van Spriel <aspriel@gmail.com>,
Kalle Valo <kvalo@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
SHA-cyfmac-dev-list@infineon.com,
brcm80211-dev-list.pdl@broadcom.com, netdev@vger.kernel.org,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH 2/2][next] wifi: brcmfmac: Use struct_size() in code ralated to struct brcmf_dload_data_le
Date: Wed, 16 Nov 2022 14:23:52 -0800 [thread overview]
Message-ID: <202211161423.2531CADA73@keescook> (raw)
In-Reply-To: <41845ad3660ed4375f0c03fd36a67b2e12fafed5.1668548907.git.gustavoars@kernel.org>
On Tue, Nov 15, 2022 at 03:55:34PM -0600, Gustavo A. R. Silva wrote:
> Prefer struct_size() over open-coded versions of idiom:
>
> sizeof(struct-with-flex-array) + sizeof(typeof-flex-array-elements) * count
>
> where count is the max number of items the flexible array is supposed to
> contain.
>
> In this particular case, in the open-coded version sizeof(typeof-flex-array-elements)
> is implicit in _count_ because the type of the flex array data is u8:
>
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h:941:
> 941 struct brcmf_dload_data_le {
> 942 __le16 flag;
> 943 __le16 dload_type;
> 944 __le32 len;
> 945 __le32 crc;
> 946 u8 data[];
> 947 };
>
> Link: https://github.com/KSPP/linux/issues/160
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
next prev parent reply other threads:[~2022-11-16 22:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-15 21:52 [PATCH 0/2][next] wifi: brcmfmac: common: Replace one-element array with flexible-array member Gustavo A. R. Silva
2022-11-15 21:53 ` [PATCH 1/2][next] wifi: brcmfmac: replace one-element array with flexible-array member in struct brcmf_dload_data_le Gustavo A. R. Silva
2022-11-16 22:23 ` Kees Cook
2022-11-22 10:14 ` Kalle Valo
2022-11-15 21:55 ` [PATCH 2/2][next] wifi: brcmfmac: Use struct_size() in code ralated to " Gustavo A. R. Silva
2022-11-16 22:23 ` Kees Cook [this message]
2022-11-17 1:06 ` Gustavo A. R. Silva
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